Description:
This sensor uses a pre-made audio board and requires no coding. Press the button to trigger a sound. This sensor can also be combined with an Arduino or other micro controller to trigger a large variety of sounds based on many different sensors. Any of the sensors presented in this gallery could also be used to trigger sound from this board. An example could be: an audio file which plays an accompanying story plays as a visitor walks in front of it in an art gallery.
Place .mp3 files on a microsd card and name them as follows: 00001.mp3 00002.mp3 00004.mp3 etc. In the most basic configuration, up to 8 files can be loaded on the SD card. To trigger them, pull the corresponding pin to GND. If a microcontroller shares the ground, triggering digitalWrite(outputPin, LOW), (with outputPin connected to one of the audio trigger pins on the board) will also cause it to trigger.
A trick to stop the sounds once they are started is: trigger a pin without a corresponding audio file.